Canon W6200 Service Manual page 113

Part 4: Technical Reference
h) The printhead convert the received print signals internally, which are in serial
format, into the parallel data used by a single nozzle array, and then perform heat
pulse and AND processing to carry out the printing.
i) The CPU in the engine controller manages the overall print drive operations while
monitoring the status of the printer components based on the adjustment values
stored in the EEPROM.
The SDRAM is used as work memory.
j) The CPU in the system controller manages the overall image processing operations
while controlling key operation and message display based on the adjustment values
stored in the EEPROM.
The firmware is stored in the FLASH ROM.
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W6200